Increment Operator

There are two types of Increment operator:
(1) Postfix Increment operator
(2) Prefix Increment operator

Postfix Increment operator(++)

It is use to increment value of variable one by one.

Syntax

variableName++

Program

#include <stdio.h> 
#include <conio.h> 
void main(){
 int a;
 int b;
 clrscr();
 printf("Enter value of a: ");
 scanf("%d",&a);
 b = a++;
 printf("\n value of b = %d",b);
 printf("\n value of a = %d",a);
 getch();
}

See Output

NOTE: In above program you have read b = a++;.In this statement value of a first assign to b then increment a.

Program

#include <stdio.h> 
#include <conio.h> 
void main(){ 
 int a;
 int b;
 int c;
 clrscr();
 printf("Enter value of a: ");
 scanf("%d",&a);
 printf("\n Enter value of b: ");
 scanf("%d",&b);
 c = a++ + b++;
 printf("\n value of a = %d",a);
 printf("\n value of b = %d",b);
 printf("\n value of c = %d",c);
 getch();
}

See Output

In above program you have read c = a++ + b++;.In this statement value of a and value of b first add then result assign to c after assignment value of a and value of b will be increment.

Program

#include <stdio.h> 
#include <conio.h> 
void main(){ 
 int a;
 clrscr();
 printf("Enter value of a: ");
 scanf("%d",&a);
 printf("\n value of a = %d",a++);
 printf("\n after increment value of a : %d",a);
 getch();
}

See Output

In above program you have read printf("value of a = %d",a++);. In this statement first value of a will be display on output screen then value of a will be increment.

prefix increment operator(++)

It is also used to increment value of variable one by one.

Syntax

++variableName;

Program

#include <stdio.h> 
#include <conio.h> 
void main(){ 
 int a;
 int b;
 clrscr();
 printf("Enter value of a: ");
 scanf("%d",&a);
 b = ++a;
 printf("\n value of b = %d",b);
 printf("\n value of a = %d",a);
 getch();
}

See Output

In above program you have read b = ++a;.In this statement value of a first increment then assign to b.

Program

#include <stdio.h> 
#include <conio.h> 
void main(){ 
 int a;
 int b;
 int c;
 clrscr();
 printf("Enter value of a: ");
 scanf("%d",&a);
 printf("\n Enter value of b: ");
 scanf("%d",&b);
 c = ++a + ++b;
 printf("\n value of a = %d",a);
 printf("\n value of b = %d",b);
 printf("\n value of c = %d",c);
 getch();
}

See Output

In above program you have read c = ++a + ++b;.In this statement value of a and value of b first increment then add. After addition result will be assign to c.

Program

#include <stdio.h> 
#include <conio.h> 
void main(){
 int a;
 clrscr();
 printf("Enter value of a: ");
 scanf("%d",&a);
 printf("\n value of a = %d",++a);
 printf("\n after increment value of a : %d",a);
 getch();
}

See Output

In above program you have read printf("value of a = %d",++a);. In this statement first value of a will be increment then display on output screen.

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